Let’s say I have loops on track 1-2(pick up machines) Can I switch to a different pattern then return to the first pattern and have those loops start playing when I switch back to the first pattern?
The issue I’m seeing is if you switch patterns pick up machines clear the buffer.
I think the best way is, to use another part on the next pattern and change the pickup machine to a flex machine that contains the record buffer of the pickup machine you recorded.
Really? A pickup machine loop is lost when I change pattern? 
No. 
Thank you! I was shocked for a moment.
This is great news! Thanks